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I'm currently using a hosted VPS on linode, I was wondering if a daily apt-get update and apt-get upgrade is providing a 'secure' enough measurement.

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Hardening of the OS itself is required. Firewall/IP tables configuration is needed, I think. – JFW Mar 28 '11 at 15:50

Daily updates will make sure that your software is updated and potentially close vulnerabilities there, but as JFW commented, you should take time and update the firewall/IPTables to close off any unnecessary ports and you should also disable any services you're not using.

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What's a standard iptables config for a server that runs Apache, Postfix (25,110,143), SSH and FTP? should I just block EVERYTHING else? Thanks – Or W Mar 28 '11 at 16:16

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